| Acronym | Meaning |
| EPMS | Engineering Performance Management System |
| FAP | Final Approach Plane |
| ELV | Electrically Operated Valve |
| SPA | Signal Processor Assembly |
| COD | Center Operations Directorate (JSC) |
| DEU | Display Electronic(s) Unit |
| FSRR | Flight Software Readiness Review |
| OST | Operations Support Team (GSFC) |
| EP | Elbow Pitch |
| PDH | Pocket Dosimeter-High |